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File system fragmentation

Publications associées (24)

reference data for "A Critical Comparison of Annual Glare Simulation Methods"

Scene and reference results files for: "A Critical Comparison of Annual Glare Simulation Methods" Stephen Wasilewski, Jan Wienold, Marilyne Andersen 2022 Buildsim Nordic, Copenhagen Contents: 01-06*.tar.gz: reference simulation image archives, one ...

Zenodo2022

Competitive Dehydrogenation and Backbone Fragmentation of Superhydrogenated PAHs: A Laboratory Study

Eduardo Carrascosa Casado

Superhydrogenated polycyclic aromatic hydrocarbons (PAHs) have been suggested to catalyze the formation of H-2 in certain regions of space, but it remains unclear under which circumstances this mechanism is viable given the reduced carbon backbone stabilit ...

2021

Unimolecular fragmentation and radiative cooling of isolated PAH ions: A quantitative study

Eduardo Carrascosa Casado

Time-resolved spontaneous and laser-induced unimolecular fragmentation of perylene cations (C20H12+) has been measured on timescales up to 2 s in a cryogenic electrostatic ion beam storage ring. We elaborate a quantitative model, which includes fragmentati ...

AMER INST PHYSICS2020

Object-Oriented Recovery for Non-volatile Memory

James Richard Larus, Nachshon Cohen, David Teksen Aksun

New non-volatile memory (NVM) technologies enable direct, durable storage of data in an application's heap. Durable, randomly accessible memory facilitates the construction of applications that do not lose data at system shutdown or power failure. Existing ...

ACM2018

Numerical analysis of fragmentation in tempered glass with parallel dynamic insertion of cohesive elements

Jean-François Molinari, Mauro Corrado, Marco Vocialta

Tempered glass panes are subjected to high eigenstresses that induce a state of compression along the surfaces and a state of tension in the inner part. Whenever a crack reaches the tensile region, it rapidly propagates and branches in all directions drive ...

2018

3D dynamic fragmentation with parallel dynamic insertion of cohesive elements

Jean-François Molinari, Nicolas Richart, Marco Vocialta

Dynamic fragmentation is a rapid and catastrophic failure of a material. During this process, the nucleation, propagation, branching, and coalescence of cracks results in the formation of fragments. The numerical modeling of this phenomenon is challenging ...

Wiley2017

GDSP: A graphical perspective on the distributed storage systems

Michael Christoph Gastpar, Saeid Sahraei

The classical distributed storage problem can be modeled by a k-uniform complete hyper-graph where vertices represent servers and hyper-edges represent users. Hence each hyper-edge should be able to recover the full file using only the memories of the vert ...

2017

Fragmentation of wind-blown snow crystals

Michael Lehning, Johan Alexandre Philippe Gaume, Francesco Comola, Enrico Paterna

Understanding the dynamics driving the transformation of snowfall crystals into blowing snow particles is critical to correctly account for the energy and mass balances in polar and alpine regions. Here we propose a fragmentation theory of fractal snow cry ...

2017

Efficient Algorithms for the Data Exchange Problem

Michael Christoph Gastpar

In this paper, we study the data exchange problem, where a set of users is interested in gaining access to a common file, but where each has only partial knowledge about it as side-information. Assuming that the file is broken into packets, the side-inform ...

Institute of Electrical and Electronics Engineers2016

High Performance Computing Simulations of Dynamic Fragmentation in Brittle Materials

Marco Vocialta

The aim of this thesis is to investigate the mechanisms behind dynamic fragmentation. This phenomenon occurs in a material when a blast or impact loading nucleates multiple cracks, whose propagation and coalescence break the specimen into fragments. Althou ...

EPFL2015

Influence of internal impacts between fragments in dynamic brittle tensile fragmentation

Jean-François Molinari, Marco Vocialta

Dynamic fragmentation phenomena involve two important mechanisms: atomic debonding and internal impacts among formed fragments. While the former, i.e. energy dissipation due to crack propagation, has been frequently studied both theoretically and numerical ...

Elsevier2015

Governance of competition and performance in European railways: An analysis of five cases

Matthias Finger

Based on extensive qualitative research, this article analyzes the governance of competition in European railways and relates this to their performance via five case studies covering the Netherlands, France, Germany, Sweden and the UK. Even though some tre ...

Elsevier Sci Ltd2014

Heteroatom Nucleophile Induced C-C Fragmentations to Access Functionalized Allenes

Nicolai Cramer, Tanguy Jean Daniel Saget

The rich structural and reactivity profile of allenes render them versatile synthetic intermediates. However, application of allenes in organic chemistry is often attenuated by inconvenient methods of preparation. Herein we present an operationally simple ...

2012

Dynamic fragmentation of a brittle plate under biaxial loading: strength or toughness controlled?

Jean-François Molinari, Sarah Levy

The fragmentation of a brittle plate subjected to dynamic biaxial loading is investigated via numerical simulations. The aim is to extend our understanding of the dynamic processes affecting fragment size distributions. A scalable computational framework b ...

Springer Netherlands2012

How the obscuration-zone hypothesis affects fragmentation: Illustration with the cohesive-element method

Jean-François Molinari, Sarah Levy

The problem of fragmentation prediction is at the origin of various analytical models. Among them, we focus on the ones introducing the idea of obscured zones. They assume that when a crack initiates at a defect, a stress release wave propagates away from ...

Springer Netherlands2011

Dynamic fragmentation of ceramics, signature of defects and scaling of fragment sizes

Jean-François Molinari, Sarah Levy

Defects play a critical role in the dynamic fragmentation process of structural ceramics. Cracks initiate at seemingly random locations, propagate and coalesce to form fragments. The process is accompanied by stress release waves, whose influence is diffic ...

Elsevier2010

Dynamic fragmentation of a ring: Predictable fragment mass distributions

Jean-François Molinari, Anthony Christopher Davison, Sarah Levy

We employ a finite element framework, coupled to cohesive elements, to model material decohesion of a uniformly expanding ring. Our study focuses on the average fragment mass, the distribution of fragment masses, and the heaviest fragments. The computed fr ...

American Physical Society2010

Exploring the Physics behind Dynamic Fragmentation through Parallel Simulations

Sarah Levy

The physical mechanisms underlying the dynamic fragmentation of heterogeneous brittle materials are explored through numerical simulations. The use of computational facilities, rather than experimental or fundamental sciences, ensures the accurate tracking ...

EPFL2010

Morphogenèse de la ville contemporaine : essai sur la multi-échelle

Unstable growth, unlimited urban sprawl, and multiple fragmentations are contemporary urban phenomena requiring new investigations and interpretations of the physical impact of form on today's cities. The city as a living organism with an evolving structur ...

EPFL2010

On the Specification of Partitionable Group Membership

André Schiper, Stefan Pleisch, Olivier Rütti

Group communication in partitionable systems has been the focus of many research activities over the last decade. Fault-tolerant applications in a partitionable system model generally rely on two basic services: a group membership service and a reliable mu ...

IEEE Computer Society2008